Contains: 19 taps, 21 dies of NC, NF and metric sizes and 2 thread files. Regular File has 8 thread pitches: 11, 12, 13, 14, 16, 18, 20, 24 tpi Metric File has 8 thread pitches: 0.80, 1.00, 1.25, 1.50, 1.75, 2.00, 2.50, 3.00mm NC-USS (Silver) 6 Taps and 7 Dies: 1/4” - 20 Tap & Die 5/16” - 18 Tap & Die 3/8” - 16 Tap & Die 7/16” - 14 Tap & Die 1/2” - 13 Tap & Die 9/16” - 12 Tap & Die 5/8” - 11 Die Only NF-SAE (Black) 6 Taps and 7 Dies: 1/4” - 28 Tap & Die 5/16” - 24 Tap & Die 3/8” - 24 Tap & Die 7/16” - 20 Tap & Die 1/2” - 20 Tap & Die 9/16” - 18 Tap & Die 5/8” - 18 Die Only 7 Metric Taps & 7 Metric Dies (Gold): 6 x 1.00mm Tap & Die 8 x 1.25mm Tap & Die 10 x 1.25mm Tap & Die 10 x 1.50mm Tap & Die 12 x 1.25mm Tap & Die 12 x 1.50mm Tap & Die 12 x 1.75mm Tap & Die Ideal for restoring the stripped threads on old, rusty nuts and bolts. Hex shape makes taps and dies easy to turn with any socket or wrench. Can be used on National Coarse, National Fine and metric nuts and bolts. Packaged in: blow mold case Made in USA.